{"uid":"cap_MQPODZjsYGcBWm_WmCQPN","slug":"base-usdc-transfer-history-lookup-bbd66973","name":"Base USDC Transfer History Lookup","description":"Retrieve newest-first incoming and outgoing Circle USDC Transfer events for one address across a validated, bounded Base mainnet block range.","url":"https://apiacre.com/v1/crypto/base-usdc-transfers","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"limit":{"type":"integer"},"address":{"type":"string"},"block_tag":{"enum":["latest","safe","finalized"],"type":"string"},"direction":{"enum":["any","incoming","outgoing"],"type":"string"},"lookback_blocks":{"type":"integer"}}},"responseSchema":{"type":"json","example":{"data":{"asset":{"name":"USD Coin","symbol":"USDC","contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","decimals":6},"source":"https://docs.base.org/base-chain/api-reference/ethereum-j...","topic0":"0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4...","address":"0x1111111111111111111111111111111111111111","network":"eip155:8453","detected":1,"readOnly":true,"returned":1,"warnings":[],"direction":"any","transfers":[{"blockHash":"0x2222222222222222222222222222222222222222222222222222222...","blockNumber":34567800,"transactionHash":"0x3333333333333333333333333333333333333333333333333333333...","transactionIndex":4}],"truncated":false,"blockRange":{"toBlock":34567890,"fromBlock":34565891,"toBlockHash":"0x1111111111111111111111111111111111111111111111111111111...","requestedTag":"safe"},"disclaimer":"Public onchain event evidence only. A transfer does not e...","usdcSource":"https://developers.circle.com/stablecoins/usdc-contract-a...","limitations":["Only Circle's official native USDC contract on Base mainn...","The result covers only the resolved bounded block range, ...","Finality and provider freshness depend on the requested b..."],"tokenSource":"https://eips.ethereum.org/EIPS/eip-20","rpcCallsMade":3,"eventSignature":"Transfer(address,address,uint256)","removedSkipped":0,"queriedLogCount":1,"duplicatesRemoved":0,"addressExplorerUrl":"https://basescan.org/address/0x11111111111111111111111111...","networkRequestsMade":2,"transactionBroadcast":false},"meta":{"cached":false,"sources":[],"warnings":[],"duration_ms":42,"next_actions":[]},"service":"crypto.base-usdc-transfers","version":"1","request_id":"018f1f54-7f38-7ba2-8dc3-5f90272d9f1a"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_OOLSZb-3uF9GDHb0zHQ5d","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves newest-first incoming and outgoing Circle USDC ERC-20 Transfer events for a given Ethereum address over a bounded block range on Base mainnet.","exampleAgentPrompt":"Can you pull all USDC transfers for the Base mainnet address 0xAbCd...1234 over the last 2000 blocks, showing both incoming and outgoing, so I can verify a recent payment?","exampleUseCases":[{"title":"Verify incoming USDC payment","prompt":"Check if address 0x1A2B3C4D5E6F7890abcdef1234567890abcdef12 received any USDC on Base in the last 2000 blocks — I'm waiting on a payment and want to confirm it arrived."},{"title":"Audit wallet USDC outflows","prompt":"Show me all outgoing USDC transfers from 0xDeadBeef1111111111111111111111111111Dead on Base mainnet over the past 2000 blocks so I can reconcile our treasury movements."},{"title":"Monitor agent payment receipts","prompt":"Fetch the USDC transfer history for my Base address 0x9999888877776666555544443333222211110000 — I need to see what payments came in recently so I can trigger fulfillment for each one."}],"resultDescription":"A JSON object containing: asset metadata (USDC name, symbol, contract, decimals), the queried address, network (eip155:8453), transfer direction, a list of transfer events each with to/from addresses, amounts in human-readable USDC and atomic units, block number, transaction hash, log index, and a Basescan explorer URL. Also includes block range details (fromBlock, toBlock, timestamps, scanned block count), truncation flag, warnings, RPC call count, and disclaimer/limitation notices.","failureModes":["Invalid or malformed Ethereum address returns a validation error","Block range exceeds the bounded maximum (2000 blocks) returns an error","Unsupported block tag or out-of-range block number returns an error","Public Base RPC unavailability causes a timeout or upstream error","Address with no USDC transfers in range returns an empty transfers array","Non-Base mainnet addresses or wrong chain return no results or an error"],"whenToPreferThis":"Choose this endpoint when you need verified, on-chain USDC transfer event history specifically on Base mainnet for a single address, bounded to a recent block range. It is ideal for payment verification, treasury reconciliation, or agent-payment confirmation workflows where Circle's native USDC contract is the only asset of interest. Prefer this over general block explorers when you need structured, machine-readable JSON output with direction filtering and atomic/human amounts in one call. Not suitable for complete historical account sweeps, other EVM chains, or non-USDC tokens.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:57:36.315Z","isFirstParty":false}